The Federal Public Defender appointed to represent Marvin Leon Shilling has *301 moved for leave to withdraw and has filed a brief in accordance with Anders v. California, 386 U.S. 738, 87 S.Ct. 1396, 18 L.Ed.2d 493 (1967), and United States v. Flores, 632 F.3d 229 (5th Cir. 2011). Shilling has filed a response. The record is not sufficiently developed to allow us to make a fair evaluation of Shilling’s claims that his guilty plea was made in reliance on unkept promises or ineffective assistance of counsel; we therefore decline to consider the claims without prejudice to collateral review. See United States v. Isgar, 739 F.3d 829, 841 (5th Cir.), cert. denied, — U.S. -, 135 S.Ct. 123, 190 L.Ed.2d 94 (2014); United States v. Corbett, 742 F.2d 173, 176-78 (5th Cir. 1984).

We have reviewed counsel’s brief and the relevant portions of the record reflected therein, as well as Shilling’s response. We concur with counsel’s assessment that the appeal presents no nonfrivolous issue for appellate review. Accordingly, the motion for leave to withdraw is GRANTED, counsel is excused from further responsibilities herein, and the APPEAL IS DISMISSED. See 5TH CIR. R. 42.2. Shilling’s incorporated motion for the appointment of substitute counsel is DENIED.